The wristband, developed by MIT researchers, contains sensors that measure electrical impulses in the skin. These impulses change before the onset of a seizure. The device also stores data that can be analyzed later, providing a more complete record of a patient's condition. It can pick up small seizures that otherwise might go undetected. From the article Topol linked to via Twitter:

MIT professor Rosalind Picard says she and her team discovered by accident that the technology can recognize 100 percent of large epileptic seizures through changes in the skin. . . . Picard says that detecting minute changes in the surface of the skin via these sensors can give advance warning of seizures. Previously this has only been possible through invasive techniques.

“The unique thing is now we have an outwardly readable signature of something that previously you basically had to have depth electrodes in the brain to get ...”

And now Picard and her team are looking at the possibility of treating epileptic seizures before they happen using the same wearable technology, and early medication techniques.

Now, how long will it take to get this technology validated and into the hands (or onto the wrists) of those who need it?